While visiting the earth pony town of Promise, the Great and Powerful Trixie is coerced into searching for a missing foal against her own better judgment. But things are not as straightforward as they first appear. When push comes to shove, what kind of pony is Trixie at heart?

The Mane-Event, a popular stage show in Manehattan, has acquired a rare creature they intend to use as part of a new act. Their typical animal handlers prove inadequate for the new job so they invite Equestria's best to be the caretaker-- Fluttershy. Moving to a new city requires the inconvenience of finding a new place to stay, however. What fortune that Trixie, one of the primary acts of the Mane-Event, just so happens to have free space at her apartment.

And then the Element of Kindness lived with the Element of Egotism.

After a mishap in a magic duel, the ponies are transported to the Team Fortress universe. They'll take the classes places while The Engineer tries to find a way to get them home.

Based on the comic by matrix541: Upon being humilated in Ponyville, Trixie remembers how she once was the happiest unicorn in Equestria and how it all came apart...

(One of my earlier fanfics, now on Fimfiction)

Comic: http://matrix541.deviantart.com/art/Trixie-s-Story-258755970

It was supposed to be boring. The Annual Magic Users Convention is the one event of the year that recognizes all the accomplishments that unicorns, alicorns and other magic users have made. It's usually a night of long-winded speeches, mind-numbing presentations and unappetizing food. But when a certain mailmare finds two tickets to the convention addressed to her house, she decides that it is not only her privilege, but her duty to attend. And after suitably preparing herself for the occasion, she changes what is usually a boring night into one of the wildest and most bizarre experiences in a thousand years.

Just what is the terribly unlikely canon-shattering secret of Celestia? Once Twilight finds out, life just won't be the same...

King Sombra has a problem. A Twilight Sparkle shaped problem. The evil ruler of the Crystal Kingdom is about to be overthrown unless he can hold out until reinforcements arrive.

Seven days of keeping Twilight at bay. What's the worst that can happen?

All he has to lose is his self-respect and dignity...

It had to happen eventually.
...actually, no. No, it really didn't.
Set immediately after the events of Boast Busters, Trixie finds herself in a quandary when she realises that she has left her purse behind in Ponyville. She faces a humiliating walk back into town to pick up her money.
Before she can turn back, however, she meets a magical, sentient pine cone... sigh. Okay. Here's a proposition.
If you can make it to the end of this story without going "what" even once, you win a free internet.

Part 1: Lyra's Pyro Predicament
Part 2: Twilight's Demoman Devastation
Part 3: King Sombra's Robotic Retaliation

After receiving a strange book from Pinkie known as "The Bombinomicon", Twilight wakes up one morning to find that the mystical tome has been stolen, by...Twilight?

Things quickly unravel as RED Team's Tavish DeGroot (Demoman) and Spy find themselves not only trying to get back home, but also fighting for their lives as villains from the Team Fortress 2 universe combine forces with some of the most dangerous foes Equestria's ever seen!

"Why do you think Trixie acts the way she does, Twilight Sparkle? Why do you think she became a showpony in the first place? She does it so she can be remembered. All the good Trixie did, all the bad Trixie did--it was all so her name would never die out, even after she herself had. She will not allow herself to be used as a catalyst for some greater scheme, then tossed to the wayside to be forgotten. She will make the world remember her name."

-----

Years after her humiliating fiasco in Ponyville, a pacified Trixie returns to try and find closure with the ponies she hurt the most. But time has wiped the slate clean in more than one way, leaving the showpony forgotten, nothing more than a fading memory in the minds of the townsfolk. Will a mare who devoted her whole life to being remembered find solace in the vastness of her impact? Or will the loss of her hallowed image tear her apart?

Art by My-Magic-Dream.